The Kansas City, Mo.-based company said in a statement provided to The Associated Press on Friday that it is "terribly saddened by the random act of violence in Aurora."

The statement said:

"AMC Theatres is deeply saddened by the Aurora tragedy. Movie going is part of our social fabric and this senseless act shakes us to our core. We're reinforcing our security procedures with our theatre teams, which we cannot discuss in detail for obvious, safety reasons. Local law enforcement agencies, our landlords and their and our local security teams are stepping up ...nationwide to ensure we provide the safest environment possible for our guests. We couldn't be more grateful for their collective support.

"At this time, our show schedules circuit-wide will not change. We will not allow any guests into our theatres in costumes that make other guests feel uncomfortable and we will not permit face-covering masks or fake weapons inside our buildings. If guests wish to exchange or refund any tickets, we will honor our existing policy and do as our guests wish. We are taking necessary precautions to ensure our guests who wish to enjoy a movie this weekend can do so with as much peace of mind as possible in these circumstances."

A suspect was arrested outside the theater near a car after the shooting at a midnight showing of "The Dark Knight Rises" in the Denver suburb.

AMC says it is actively working with local law enforcement in communities across the country to make sure its facilities are safe. It says on its website it has more than 300 movie houses, making it the nation's second-largest theater chain.